Counting-machine.



w. P RE; COUNTING MACHINE. AIPLIOATION TILED DECfll, 191 1.

- Patented Mar. 24, 1914;

. 5 SHEETS-SHEET 2.

W. FUHR. COUNTING MACHINE.

APPLI CATIQN FILED D110. n, 1911. v Patented Mar. 24, 19M

5 $KEETS=-SHEET 3.

W. PUHR. comma mom's. APPLIOATION FILED DEO.11,-1911.

' Patented Mar. 24, 1914.

5 SHEETSSHEET 4.

ilrlullllli A ZNIIIIIIII I 1| III- jnvanwn w. FUHR. COUNTING MACHINE.

APPLICATION FILED DBO.11, 1911.

Patented Mar. 24, 1914 meral ring in cross-section. Fig.

BEST AVAILABLE C OP PATENT OFFICE.

wi LIAM FUHR, or onrcnoo, ILLINOIS.

To all whom it may concern Be it known that I, \NILLIAM Form, a citizenof the United States, residing at Chicago, in the county of Cook andState of Illinois, have invented certain new and useful Improvements inCounting-Machines, of which the following is a specification.

My lates to a countingma- I invention re V chine adapted to either addnumbzrsor subtract number in combination -with a typewriter. A

The principal object of my invention is to construct a machine that islight, rapid and simple in its operation with a small number of parts,which will be particularly adapted to manner of operation use bytypewriter operators, and which at the same time will be accurate bothin its operation and as to the result.

Further objects of my invention are. to provide means for stopping therings carrying the numerals at the desired point in their revolvingmovement and for prevent-- ing a. numeral-carrying 'ring fr0m moving anadjacent numeral-carrying ring except when necessary; a furtheradvantage of my device resides in the means for shifting the mechanismso that it will subtract instea of add and vice versa', and will permitthe operating of the typewriter without operate. ing my device. a

Still a further advantage resides in the means wherebythenumeral-carrying rings are locked against overthrow when not inoperation, and against rebound, when in operation.

Further advantages of the invention will Specification of LettersPatent.

:view of is a section on the line -31 is a side elevational view of thedouble 25; Fig. 32 is an edge in Fig. 31; F

appear throughout the Specification and W111 be more specificallypointed out in the claims. 1 1

In the accompanying drawings Figure 1 is a front elevational view of myimprov counter attached to a typewriter; Figs. 2 and 3 areend'elevational views of Fig. 1,

- bars 43.

ing the same.

with parts broken away; Fig. 4: is an elevational view of end of tubularguide containing carrying star wheels, wit-ha nu- 5 is a detailed endview of Fig. 4: with part broken away, and a numeral-carrying ring inposition. Figs. 6, 7, 8, 9, 10, 11, 12, 13, 14, and 16 are detailedviews of parts composing the mechanism for carrying and locking thenumeral-carrying rings. Figs. 17," 18

' COUNTING-MACHINE.

Patented Mar. 24, 1914.

Application filed December 11, 1911. Serial No. 665,014.

and 19 are enlarged detailed shifting means, end of main and oneof thegears in respectively; Fig. 20 is a side elevational the casinginclosing the numeralcarry ng r ngs mounted upon the numeralcarrying ringuide; the guide being shown in section. ig." 21 is afront elevationalview of the numeral-carrying casing; Fig.

views of the drive shaft,

22 isa'plan view of'one-of'the numerah carrying rings; Fig.-- 23 is asection on the line a-b of Fig. 22; Fig. 24 is an enlarge detailed viewand side elevation of ar'a-tchet mechanism with link connected to keyrock bar of typewriter; Fig. 25 is a front elevat onal view of Fig. 9A.;Fig-26 is aperspective view of the outside casing for t e ratchetmechanism shown in Figs. 24: and 25; Figs. 27 and 28 are guard casingsfor the ratchet mechanism operating the numeral-carrying rings 1 and 9,respectively; Fig. 29 is a rear view of Fig. 28; Fig. 30 c-d of Fig. 29;Fig.

ratchet shown in Fig view of Fig. 31; 1g. 33 is a side view of the dogengaging one of the ratchets shown ig. 34 is an edge view or Fig. and36are side and edge views,

33.;F1gs;

of the plunger shown in Figs.

respectively, 24 and 25 I Referringnow more, specifically to drawing,the typewriter herein shown is of the ordinary construction andconstitutes no part of m invention; consisting of a frame 4.0, lettereys designated asst-whole as 11, and ten numeral keys, designated as awhole as 42, all of which, both numeral and letter keys, being mountedupon the ordinary rock The typewriter is also rovide with a carriage i4and handle 44 or shift- A suitable, frame 45 is attached tothetypewriter frame by means of'two elbows long horizontal section and ver46, having a tical integral end pieces 45 and 45"-const1-- tuting theentire framev upon which my mechanism is mounted. Botatably mountedbetween the ends of theirame is the main drive-b21147 upon which arerigidly mounted nine double ratchet wheels 48,-8", 48, 48, 48, 48", 48*w 7 Each double ratchet consists of a ratchet wheel 49 having its teethoppositely-disposed to the teeth said shifting means, 7

ion

I drop within the -slot 53 and engage the e5 ratchet wheel.

the head 56 be"ng arranged adjacent the cam surface 53 and covering slotopening p of the smaller ratchet wheels A guardcasing 51 is rigidlysecuredto the frame and casing is provided with two slot openings 53 53of the plunger striking the cam surface into engagement with the teethof' the ratchet 50, thereby locking said ratchets 50' 'not move relativeto the guard-casing and causes the ratchet wheels to be rotated a cer-BEST VAIL BLE COP extends over the smaller ratchet wheel 5Q.' Each pairof ratchet wheels is provided with a guard-casing, which differ only inthe po: sition of the slot openings in the same, --which will behereinafter described; M etai' straps 52 are pivotally mounted on thedrive-bar 47 bearingagainst the guard-casing on 'one side and the largerratchet 'wheel on the other side of each of the double ratchetmechanisms here described. Each 'guard-- and 53, the, latter openings,53 being the outlets for the plungers 54 which are backed by springs 55,normally pressing the plungers 54 toward the larger ratchet wheels 49.In their normal position these plungers' rest againstthe guard-casings51, but when 'it is desired to move any pair of'ratchet wheels adownward movement of the plunger, as

viewed in Fig. 24;, will cause the plunger to ratchet wl ee1-' 49, andthe lip 53 upon each plunger will travel beneath the int-urned edge 53?of the guard-casing 51, which inturned edge 53 keeps the plunger 54 engaged to and drawing ratchet wheel 49 with t until it reaches the outletslot opening 53*, whereupon the plungeris thrown out 'of the outlet slotopening 53 by reason of the-lip 53, lifting the plunger, against theaction of its spring 55, ontop of the guard casing thereby disengagingthe plunger, from the A dog 56 having a head 56 and pawl .56, arearranged in a' groove 56 on the side of the guard-casing shown; in Fig.29,, with! pawl 56 fitting slidably into slot 51 and extending over thesmaller ratchet wheel 50,

53, so that when the lip 53* of plunger travels upon the cam surface it.strikesthe' head 56, thereby moving the dog 56 transversely of theratchet 50, which draws the pawl 56 againstfurther movement since thedog canthe latter beingisecured to the frame 45. ,A spring 57 is securedto the guard-casing and bears against the dog 56 to normally hold thehead 56 to cover slot opening 53 and the pawl56 out of engagement withthe strap I 7 circumferential ofihe drive-bar a7,

tain' distance, depending upon'the distance betweenthe slot openings 53and 53 in each guard-casing, and by reference to Figs. 27 and 28 it willbe noted that the openings 53 and 53*?of are considerably farther apartthan in Fig. 27.

As nine guard-casings are provided for the ninepairs of-ratchets andsince Fig. 27

illustrates J the gu'ard-casin g inclosing ratchet inechapism foroperating numeral ring number,1,-- as hereinafter described, and Fig.28' illustrates the guard-casing inclosing the ratchet'meehanism foroperating numeral ring number 9, it will be understood that theintermediate guard-casings between the end ratchet wheels" are providedwithsimilar slot openings 53 and 53, all of which differ only in thatthey are successively farther apart [than the distance between theopenings shown "in -Fig.- 27. The purpose of varying theopeningsis togive the drive shaft4 7' different degrees. of rotationupon theoperation of any pair of ratchet wheels and resulting in the rotation ofthe numeral rings (hereinafter described) to different extents.

Loosely mounted upon the drive shaft 47 .at each endthereof, are gears'58 and 59 which are held in mesh with other gears (hereinafterdescribed) at all times by washers58 and 59 fixed on the drive shaft-47. The drive-shaft47 is hollow' and has two oppositely arranged slots47 and 47 at each end. Inside of the drive-shaft 47 is slidablymounted-a shifting rod 60; said shifting rod carries dogs 60 and 60 ateach end thereof which shift in slots 47 and 47 but'do not shift out ofengagement. of said slots, thereby prohibiting rotation of saidshiftingrod inside of drive-shaft 47." The ends of dogs 60 and 60areada'p'ted to enter between the teeth of gears 5 8and 59 and being soarranged that when "one dog is in engagement with one of the gears theother dog will be out of engagement. The. purpose of these dogs is toreverse the rotation of the mechanism for adding or subtracting, as maybe desired,-and both dogs maybe thrown out of engagement at the sametime for the purpose ofpermitting the typewriter to be' operatedindependent of the counting machine.

For operating the shifting-rod 60 I provide. a ring 61with two studs 61on opposite sides of the ring, said ring 61 fitting loosely over one endof the shaft 60 and held in position by screw 61, allowing shaft 60 torotate within said ring 61 but not to shift therein. Said studs 61% areadapted to enter slots 61". formed on opposite sides of the shiftinglever, hereinafter described, as viewedin Figs. 2 and 1-7.

Mounted on the integral endpiece 45 0f the frame 45 is a shifting frame62,, with arm 62 at one end and face arm 62 at the 7 other, said facearm 62 having a slot 62" with 3 notches62", 62 and 62, indicatingsubtracting, disconnecting and adding, respectively. Within said slot 62one end of ES AVAILABLE co lever 62 slides, the other end of the leverbeing pivoted-to arm 62*. as'shown in Fig 17. The lower side of thatportion of lever 62 sliding within slot (52 is beveled to a pointfitting into notches 62 62" and 62, thereby prohibitingindependent"shifting of shaft 60 during operation. Slot-(52 is ofasuiiicient width to allow lever 62 to shift withinit when not inengagement with one of the notches.

Mounted upon the upper ends of integral end pieces and i5 is the numeralring drive-shaft 63having rigidly mounted gears 63 and 63 at each endthereof. Mounted on integral'end piece 45, between gear 63 of numeralring shaft 63 and gear 58 of main drive-shaft 47, are two gears 64 andxii-while mounted on integral end piece 45*, between gears 63 and 59there is but one gear 65, all of which are in mesh, as shown in Figs. 1,2 and 3. There is'also mounted on end piece 45 a spring arm (id havingrollers 66 and (36 at each end thereof, as shown in Fig. 2, said rollershearing against the teeth of gears 63 and58 to prevent independentrotation of same.

A tubular guide surrounds the numeral ring drive-shaft 63, said guidebeing prefer: ably hollow and formed in two sections 67 and 67. Adrive-wheel 68 is mounted upon the drive-shaft (33 and is. provided witha lug 69, the purpose of which will bevhereiir' after explained. Thedrive-wheel 68 is preferably mounted between the inner ends "of thetwo-part tube 67 and 67" and capable of rotating there-between. The tubeis pro vided with longitudinal friction plates 71 and .71 arranged onsamewhich normally extend out beyond the periphery of the tube, Anopening 72 is formed in the tube 67 through which a portion of the star-Wheels 73 project.

The mechanism will now be described for carrying the numeral rings, in.the event of certain numeral-rings being addedto beyond 9, or subtractedfrom below 0: A spool 74 is adapted to fit within the tube 67 andhas ahorizontal body portion 74- crescent shaped in cross-section as shown inFig. 5', within the arc of which the numeral ring drive-shaft 63 isadapted to rotate. A plurality of four arm starwheels 73 are mountedupon the shaft 73*, said shaft being secured between the ends of thespool 74. There are preferably nine star-wheels, all of similarconstruct-ion, independently mounted upon the shaft73f, and adapted torotate thereon, one arm of each star-wheel extending beyond theperiphery of thetube 67.- The outer faces of arms of each star i wheelare provided with grooves 73" and 73, and shoulders 73 73 and 73, asshown in Fig. 8, Arrangedto the rear of'the row f of star-wheels are aseries of movable stop- F blocks 75', each having a curved and diagonal1 their central positions.

lip 7 5 adapted to engage the grooves 73 and 73 on the star-Wheels.These stop-block lips 75?, in their normal positions, rest between thearms of star-wheels 73, with one end of lip covering the narrow end ofgroove 73 and the other endof same lip covering the narrow end of groove73 of the next 'star wheel arm, but these lips engage with said groovesuntil a starwvheel is rotated one way or the pther. These stop-blocks 75are each pivoted to-a bar 75 fitting within the grooves 75 formed in therear of each stop-block, said bar being secured between the ends ofspool 74. Arranged'behind the stop-bloeks 75 is a spring finger 7 5which is backed by springs 76" normally pressing the finger against thesquare shoulders of stop-blocks, and which of a suitable length toengage all the stop-blocks to normally hold them in i A plurality offrictioii shoes '76 are pivoted on a pin 7(3 secured between the ends ofthe spool, a shoe being provided for each star-wheel and the end of eachshoe being provided with a large face 7 6 normally pressing against andholding star-wheels in their proper positions by springs 76", as shownin Fig. 5. Starwheels 73, stop-blocks 75,and shoes 76 are all ofthe samewidth and in horizontal alinement.

The functions of the stop-blocks -75 are to prevent the star-wheels frombeing rotated more than a quarter of their circumference (which isequivalent to one space or 1/10 of the circumference of the numeral.ring) at one time, and as there are four arms to each star-wheel and astar-wheel moves a quarter of its circumference in one operation it willbe understood that as soon as one arm moves within the periphery oftul'mlar-guide 67 the next following arm moves into its position. Uponrotat-ion of one of the star-wheels (the means fcr rotating the samebeing hereinafter explained) either groove 7 3 or groove 75 will beengaged by the lip '75 of stop-' block 75, depending upon whichdirection the star-wheel is rotated, as follows:

Since the lips 7 5 of stop-blocks are diagonal and. the stop-blocks arepivoted (the star-Wheels not being movable laterally) the downwardrotation (subtracting) .of starwheel will cause the lip 75 to go throughgroove 73 of star-wheel, bearing against shoulder 73 -with its diagonal.surface and being forced to shift to the left, thereby coml ingin lineand by further rotation of starwheel. coming in contact with the wideend of shoulder 73 of the next following arm of star-wheel, there-bystopping further rotation of star-wheel and at the same time d1s-.

engaging itself from groove 73 of arm of star-wheel just passed, when itWill be 'returned to its normal central position by spring-finger 75. 4

The upward rotation (adding) of star- BEST AVAILABLE cop groove 73" ofstar-wheel arm, bearmg' against shoulder 73 with its diagonal stir--face and being forcedltoshift to the right 1 (instead. of to-the leftas'in the downward rotation of star-wheel) thereby coming in l ne, andbyfurther rotation of star-wheel,-

coming in contact with the side end of shoulder 7 3jof the nextfollowing arm of star wheel, thereby stopping furtherrotation ofstar-wheel and at the same time dis-engag ing itself: from groove 73 ofthe arm of star-wheel just passed and thus will be returned to 1 itsnormal central position by spring-finger 75.

, The ffunction of the shoe 76 is to prevent independent rotation of theindividual wheels. g The numeral mechanism 'willnow be described]: Acasing 77 is provided with endplates 7 7, said end places being'formedwith a'plurality of oppositel arranged" grooves 77 forthe purposeof a owing said casing 77 to shift over' lug 69 ofldrive-wheel 68 andfriction-bars 71 and 71*. The casing 77 is also provided with alongitudinal slot 77, through which the numeral rings, hereinafterdescribed, may be viewed. Withinthe casing7 7 are a' plurality ofnumeral-carrying rlngs 78 which are provided with a se-' 'ries ofteninternal teeth 79 and 7 9*, spaced in relative "arrangement Wit-1Lthe teeth theoutsidemera1-rings 7 8, all of which are the same andformed by grooves 77 in the end plates 77.

Nine of these numeral ring teeth 7 9are sub-.

stantially one-half the width of-the ring 78,

and one tooth .79 is substantially twice the width of the teeth 79. inother words, .as widefaslthe ring 78.. This full-width tooth 7 9 isarranged betweenthe numerals9 and 0, it being understood that the toothis in the inside of ringwhile the numerals are on There are -preferablyten nuon the circumference ofwhich are arranged the digits'l, 2, 3, 4,5, 6, 7, 8, 9 and 0. However, in the case of calculating in dollars andcents the casing 77 would have to contain a decimal rin'g, identicallythe same as a numeralring with the exception that its circumferencewouldcarry ten'decimal points instead of numerals, said decimal-rim beingrigidly attached to numeral-ring in the tens column and would occupy thesame position between the numeral-rings as the decimal.

The end plates 77 of casing 77 and the numeral rings are so designedthattheir inner peripheries will slide upon the exterior surface of thetubes 67 and 67, and the pur pose of the bars 71 and 7l -(which fit-slid ably into grooves 77 of end plates and point does between dollarsand cents.

grooves between the teeth (if numeral rings) is to prevent thecasing 77and the inclosed rings from turning relative to theatubular guides 67and 67, although 1t mustnbe understarstood that thebars 71 and 71terminate short of the center... of the tubularguides, leaving a marginin which the numeral rings are free to rotate when driven without interference by the bars -71 and 71 Fig. etshows-the relative positions ofthe numeral-rings7 8 (in cross-section on the line EF of Fig. 5) tostar-wheels when in position for operation, numeral-ring78 being atpoint of operation. The left half of. drive-wheel 68, carrying lug 69,is in line and in engagement with the right half of numeral-ring 78carrying an unbroken line of teeth, viz: the nine half-width teeth 79and the right half of the full-width teeth 7?, andthe left halfof'the-same numeralr1ng,.carryin only one tooth, (being the left half oft e full-width tooth 79*) is in line,,withthe right halfof star-wheel(a) but does not come in engagement with said star-wheel "until anumeral-ring has been r'otated-9-spaces and showsthe'numeral 9- in slotopening of casing 77, assuming that before this operation it showed thenumeral 0 and {the operation is adding. The left half of star-wheel (a)is in line and engagement with the right half of numeral ring 7 8", andthe left 'half of numeral ring 78 is in line, but not in engagement,with the right half of star-wheel (b). The left half of star-wheel (b)is in line and engagement with the right half ofdecimal-ring 7 8,and

the left-half'of decimal-ring 78 1s in line,

half of the decimal-ring, in their normal positions, are in line andengagement with the lefthalves of the star-wheels and the left half-ofthe drive wheel and are proelled ,b same; the en ement bein aused b; theleft.halves, a arms of star wheels being between the teeth of-numeraland decimal rings, and the lug 69 on the left half of drive-wheel-beingbetween the teeth of the same rings when said. rings are in line withit. The left halves of all numetal and-decimal rings (carrying but onetooth each, that being the'left half of fullwidth-tooth 79) in theirnormal positions, are in line with the right halves of star wheels andcome in engagement and propel. samewhen the numerals 9 or 0 appear inslot opening of easing. Inv other words,

when drive-wheel revolves the numeral' ring in engagement with-it tenspaces (one complete revolution) the left half of the same numeral-ringengages the right half of arm of star-wheel and draws it along adistance equivalent to one space; the eft half of the same arm ofstar-wheel being'in engagement with the unbroken line of teeth- (righthalf of numeral ring) of an adjacentnumeral-ring it draws the adjacentnumeral-ringalong with it one space, when said arm of star-wheel moveswith the periphery of tubular guide and out of engagement ofnumeral-ring.

From the above it will be noted that the star-wheels and drive-wheelperform the same functions, with the exception that the drive-wheel canrotate a numeral ring 1, 2, 3, 4, 5, 6, 7, 8 or 9 spaces, as desired, inone operation and is propelled by driveshaft 63, while a star-wheel canrotate a numeral-ring just one space in one operation and is propelledby the left half of an adjacent numeral-ring by means of the singletooth 79. I urthermore, lug (E9 of drive-wheel has ten normalpositionson the circumferential periphery of tubular guide 67, in otherwords, lu 09 may be in alinement with any one of the ten grooves betweenthe teeth of numeral-ring, as shown in Fig. 5, while the arms ofstar-wluaels have but one normal position on the circumferentialperiphery of said tubular-guide 67, as shown in Fig. 5. The-teeth ofcasing 77 in their normal positions, are never in line or engagement.with lag 60 of drive-wheel, being either on one side of it. or theother.

The fastening of decimal-ring 78 to nu-' meral ring causes twostar-wheels to move as one, which has no effect on the result, becausewhen decimal-ring is in line and engagement with lug -0lltne decimalpoint (period) typewriter key is struck which does not put drive-wheelin operation. as the decimal point typewriter key is not connected tomain drive-bar. However, upon releasing said decimal point typewriterkey casing 77 shifts one space to the left (one space being equivalentto width of numeralrmsgs).

tar-wheels 73, stop-blocks 75, shoes 76 and numeral-rings 78 are all ofthe same width, said width being equivalent to the distance ty ewritercarriage shifts from right to left 1y one stroke of typewriter key,therefore, it will be understood that each shift of] the casing 77shifts the numeralrings, one after the other, in line and engagementwith lug 69 of drive-wheel 68.

No special care need be taken in the striking of the typewriter keys byreason of this counting device being attached, and it is not necessaryto follow the key with the finger to its limit of depression, as plunger54 cannot be thrown out of engagement with ratchet wheel 49 before theproper time by any manner of stroke, by reason of the inturned edge 53of guard-casinglocking plunger to engagement with ratchet whee untiloutlet slot 53 is reached.

From the above it will be noted that the device is in its normalposition both at the beginning of stroke and. at the and of stroke, withthe exception of strap 52 attached to typewriter key, which, beingattached to typewriter key returns to its normal position at the sametime with said key, while -all the other parts are in their normalpositions when depression of key is finished, therefore, there no dangerof one part overtaking another no matter how fast it is operated.

This device can be attached to both a single or double shift typewriter.all that is necessary to adapt it from one to the other is to reset thenumeral ring casing 77 to the bar 83.

By shifting the lever 69 to the right the dog (50 will engage the teethof the gear 58 and upon the operation of the machine the numeral ringshaft 63 will be rotated in one direction for adding. By shifting thelever 02 to the left, as viewed in Fig. 17, the dog 60" will be throwninto engagement with the gear 59 so that upon the operation of themachine the rotation of the drive-shaft 63 will be in the oppositedirection from its rotation through the gear 58. By throwing both dogsout of engagement the typewriter alone may be operated, as the maindrive shaft 47, if the numeral keys of the typewriter are struck, willthen rotate without rotating gears 58 and 59.

The typewriter rock-bars 43, bearing numeral typewriter keys 1, 2, 3, 4,5, 0, 7, 8 and 9 are connected to the metal straps 52 by means of links82, the upper ends of which are forked and engage studs 82 upon oppositesides of the straps. The casing 77 is connected to the'scale bar 83 ofthe typewriter by buckles 77 and is movable therewith along the tubularguide 67, these buckles being soarranged as to have play backward andforward, but not from left to right, thereby eliminating hearing ofcasing 77 on the tubular guide 67.

The operation of the device is as follows:

hen it is desired to add, the lever-62 is shifted to the right so as tobring the dog 60 into engagement with the gear 58. Assuming that it isdesi ed to add the two sums of 1000.09 and 65 6.36, the carriage of thetypewriter (carrying scale bar 83, which in turn carries the casing 77containing numeral rings) would be shifted along in the ordinary way,moving the casing 77 along the tube 67 until the numeral ringdesignating. thousands is in position to be engaged by the lug 69 on thedrive-wheel 68. The thousands numeral-ring is the seventh one from theri ht hand side of the casing 77, as viewed in Fig. 1, and upon whichappears the numeral 1. The numeral typewriter, key 42" (being thenumeral 6) is'then struck drawing the link bar 82 downward, which inturn pulls the strap casing 52, whereu on the lip 53 of lunger 54 dropsdown t e cam surface of s ot opening 53 of guard-casing causing plunger54 to engage ratchet 49, thereby rocking the "shaft 47, which, throughthe medium of the gears 58.

plunger has engaged the ratchet and said ratchet has been moved asuthcicnt 64', 64 and 63, rotates the numeral ring drive-shaft 63carrying the drive-wheel 68, as shown in Figs. 1 and 2.

Thelug 69, on the drive-wheel 68, being engaged to teeth of the numeralring in line with it, in this case being the ring in the thousandscolumn and showing the numeral 1, rotates said numeral ring six spaces,which will bringthe numeral 7 thereon within the slot opening in casing77. When the wheel 49 distance to present the proper numeral in the slotopening 77 of casing 77 the lip 53" of plunger will then have reachedthe cam surface 53 of uard casin Y and the moving of said lip on thiscam sur ace will cause the plunger to be. withdrawn from the teeth ofratchet. wheel, against. the action of the spring 55, thereby raisingthe head 56 of dog 56, against the action of spring 57, as shown in Fig.29, and pulling the pawl 56" at the other end of said dog 56 between theteeth of the smaller ratchet wheel 50 and stopping its further rotation,said pawl being held between the teeth of ratchet 50 until lip 53 ofplunger passes (in its downward movement) the head 56 of dog 56, therebysmothering rebound. As soon as lip 53 of plunger passes head 56" the dog56 is released and will be iulled back to its normal position by spring57, with head 56" again covering slot 53 in guard-easing 51 and pawl 56in its position disengaged from teeth of ratchet 50. The beveled surfaceof head 56" will then allow lip 53* of plunger (on the return movementof strap 52 to its normal position) to reach the outside of inturnededge 53 upon which it slides until it reaches its normal position. Thesame means which returns the typewriter numeral key to its properposition after being struck re-sets the strap 52 bearin plunger 54 foranother operation. Upon the numeral typewriter key 42 being released thecasing 77 is shifted to the left the width of one numeral ring by thecarriage. of typewriter, as viewed in Fig. 1, by the normal operation ofthe typewriter, thereby bringing the sixth numeral ring from the rightof the casing, showing the numeral 0 in aliuement with the drive-wheel68, and by striking the numeral typewriter key 5, designated as 42", thenumeral 5 will appear adjacent the numeral 7 and to the right thereof,as shown in Fig. 1. Upon typewriter key 42 being released, the casing 77is shifted another space to the left, and by striking the typewriter key7, designated as 42, the numeral 7 appears on the l'.t't.h numeral ring.Upon typewriter key 42 being released, casing 77 is again shifted to theleft and by again striking the numeral typewriter key 42 the numeral 5appears upon the fourth numeral ring from the right. Upon release oftypewriter key 42" the casing 77 is again'sbifted to the left brin ingin alinemenawith the drive-wheel 68 the third ring, which is the decimalring and which is rigidly connected to second numeral ring from theright,

whereupon the letter typewriter key period), designated as 41 (which 'isnot linked to counter device and does not more the drive-wheel (58) isstruck. U poh release of letter key 41 the casing 77 18 again shifted tothe left bringing the second numeral ring in line with the drive-wheel,whereupon by striking the numera typewriter ke} 23, designated as 42,the numeral 5 appears on the second numeral ring from the right. Uponrelease of typewriter key 42 casing 77 again shifts to the left bring Iin" the first numeral ring from the right site of casing 77 (upon whichappears the numeral 9) -1n alinement with drive-wheel 68, and as thefull-width tooth 79? is between the numerals 9 and l), and the numeral 9appears in slot opening, left half of said full-width tooth 7%) is inengagement with the right half 0 fstar-wheel, the left half of samestar-wheel beingin engagement with the right half of the numeral ring onwhich operation was just completed and upon which the numeral 3 a pearsthrough slotopening; whereupon, striking the numeral typewriter key 6,designated as 42', the.numerals ap caring in order will be 0. instead of9 on t ie numeral ring in enga ement with dri\ 'e-wheel,' and 4 instead0 3 on the second numeral ring, then 1, 2, 3, 4 and 5 will-appear on thenumeral-ring in enga einent with the drive-wheel, completing tieoperation. All of which makes the total 7576.45 as shown in Fig. l.

The returning of the numeral rings to zero and writing the total on thesheet in typewriter the individual series of num-. bers having eenwritten on the sheet at the same time they were taken up by the numeralrings in casin 77) is accomplished in one operation, to the extremeleft, thereby setting the device for subtracting, and by writing thetotal shown in casing 77 on sheet the same amount will be subtractedfrom numeral rings, leaving all numeral rings set at zero.

lhe subtracting of one number or a series of numbers, from anothernumber or series of numbers is accomplished by the same operation of themechanism just described, except that the lever 62 is shifted to theleft, thereby throwing the dog out. of engagement with the gear 58 andthe dog 60" into engagement with the gear 59. When the mechanism is inthis shifted position the rotation of numeral ring drive-shaft 53 willhein the reverse direction from that when the lever 62' was.shiited'tothe extreme right with dog 60' in en agement with gear 58. The operationweak? be as follows:

If it .was desired to subtract 1000.09 from 7570.45 the typewritercarriage would be shifted in the ordinary way until the casing 77 wouldbe relative to the drive-wheel 68 a so as to bring the seventhnumeral-ring, showing the numeral 7; in line with said drive-wheel. Thenumeral typewriter key 1. designated as 42', would then be struckturning the numeral ring showing 7 one space lower and bringing thenumeral 6 into view. Upon the release of typewriter key -12 the casing71' would shift the width of one numeral ring to the left, as in thecase of adding, bringing the sixth numeral ring (showing the numeral 5)in line with the drive-wheel. The numeral typewriter key 0, designatedas 42 would then be struck and released which would cause casin 77 toshift one space to the left, without liaving moved drive-wheel 68, astypewriter key 0, designated as 42 is not in any way connected to mydevice. The drive-Wheel 68 is now in engagement with the fifth numeralring (showing the numeral 7) and as there are two more Os, one decimalpoint and another before we come to the numeral 9 of 1000.09, typewriterkey 42 will be struck twice, decimal point (period) typewriter key$1will be struck once and typewriter key 42 will be struck again, all ofwhich shifts the casing 77 four spaces bringing the last numeral ring(showing the numeral 5) in line with drive-wheel 68. U on strikingnumeral'typewriter key 9 esignated as 42') the. following numerals willbe brought. successively in view: 4, 3, 2, 1, 0 (in this position thefull-width tooth 79" on the left half of this numeral-ring is inengagement with the right half of arm of star-wheel; the left half ofsame arm being in engagement with 1e numeral-ring upon which operationwas st completed, showing the numeral 4) then 9, 8, 7 and'G. The movingfrom 0 to 9 caused the full-width tooth 79 to engage and rotate arm ofstar-wheel one space, and as the left half of this arm was in engagementwith the adjacent numeral ring to the left it pulled same with it onespace, thereby showing 3 instead of 4 on the second nultl moralringpthus obtaining the remainder 1. The combination with a typewriterhaving numeral keys and a laterally shifting member, of a casingconnected to said laterally shifting member and having an openintherein, a series of numeral rings rotatabdy mounted in said casingprovided with internal lugs, a tubular support upon which said-numeralrings and easing are slidably mounted, a drive-shaft in said support, adrive-wheel on said shaft adapted to engage one of the lugs on any oneof-said numeral rings for rotating one of said rings, a series of armwheels mounted within said tubular support and the eripheries of whichextend beyond the perip ery of said support. and between adjacent lugson said numeral rings, means for locking the numeral rings not driven bysaid drive-wheel and means for actuating said drive-wheel.

2. The combination with a typewriter having numeral keys and a laterallyshifting member. of a casing having an opening therein and connected tosaid laterally shifting member, a series of numeral rings rotata lymounted in said casing and having in ternal lugs, a support upon whichsaid casing and numeral rings are slidably mounted, a drive-shaft, adrive-wheel adapted to engage a lug on any one of said numeral rings, aseries of arm wheels rotatably mounted within said tubular support andthe ends of which arms extend beyond the periphery ofsaid support andbetween adjacent lugs on said numeral rings, a single lugion each ofsaid numeral rings adapted to engage one of the arms of said wheels atpie-determined times, means for lockin the arm wheels not driven, meansfor loc (ing a drivenarm wheel against rotation more than a quarter ofits circumference at one time, means for lockin said numeral rings notdriven by said d iive-wheel and means for actuating said drive-wheel. i

3. The combination with a typewriter having numeral keys and alaterally-shifting member, of a casing having an opening therein andconnected to said laterally shifting member, a series of numeral ringsrota ta ly mounted in said casing and having internal In S, a sup ortupon which said casing an numera rings are slidably mounted. adrive-shaft, a drive-wheel adapted to engage a lug on any one of saidnumeral rings, means for actuating said driveshaft, a drive-bar, meansfor actuating said drive-bar'and for imparting rotating movements ofdifferent extents thereto comprising a series of ratchet wheels rigidlymounted thereon, a series of levers pivotally mounted on said drive bar,means on each lever for engaging its complementary ratchet wheel, meansfor'disengaging said engaging means at. pro-determined extents ofmovement of said levers, riving means ing therein and conneeted to saidlaterally therein and. connected to said laterally shift- -mounted, adrive-shaft in said support, a

. rings for rotating one of said rings, a series BEST AVAILABLE CO?between said drive-shaft and drivegba r and means connecting said leverswith the numeral keys'of the typewriter. a

4:. The combination with a typewriter having numeral keys and alaterally shifting member, of a casing having an openshii'ting member, aseries of numeral rings rotatably mounted in said casing and havinginternal lugs, a tubular support upon which said numeral rings andcasing are slidably mounted, means for preventing the rotation of saidcasing relative to said tubular support, a drive-shaft in said support,a drivewheel on said shaft adapted to engage one of the lugs on any oneof said-numeral rings for rotating one of said rings, a series of armwheels mounted within said tubular support and the arms of which extendbeyond the periphery of said support and be tween adjacent lugs on saidnumeral rings, means for locking said numeral rings not driven by saiddrive-wheel, means for actuating said drive-wheel, and means forrotating said drive-shaft in either direction.

' 5. The combination with a typewriter having numeral keys and alaterally-shifting member, of a casing having an opening mg member, aseries of numeral rings, rota tably mounted in said casing and-"havinginternal lugs, a tubular support on which said numeral ,rings and easingare slidably drive-wheel on said shaft adapted to engage one of the lugson any one of said numeral of arm wheelsmounted within said tubularsupport and the arms of which extend beyond the periphery of saidsupport, means for-locking said numeral rings not driven,

by said drive-wheel, means for actuating said drive-wheel, means forpreventing the rotation of said'casing relative to said tuba between theend-gears at-the other end, and

means for engaging either end gearon said drive-bar to impart oppositerotating movements to said drive-shaft.

6. The combination with a typewriter having numeral keys and a laterallyshifting member, of acounter comprising a casr' ing having an openingtherein, a'series of numeral rings 'rotatably mounted in said casing andhaving internal lugs, a' support upon which, said casing and numeralrings are slidably mounted, a drive-shaft, a drivewheel adapted toengage a lug on any one of said numeral'rings, means foractuating saiddrive-shaft, a drive-bar, means for actuating said drive-bar andforimparting rotating movements of different extents thereto comprisinga. series of ratchet wheels rigidly mounted thereon, a series of leversp1votally mounted on. sald drlve-bar, means on each lever' for engagmratchet wheel means or disengaging said' engaging means at predeterminedextents, of

its complementary movement of said levers, drivin means between saiddrives-shaft and dr ve-bar and connecting means between said levers andthe numeral keys of said typewriter and between said casing and alaterally shifting member'ofsaid typewriter; WILLIAM FUHR.

Witnesses: 1

JAMES R; OFFIELD,

SADIE M. RYAN.

Copies of this patent may be obtained for five cents each, by addressingthe .Gommissloneiof Patents,

Washington, D. G.

